For the dough, mix flour, 75 g sugar, 1 packet of vanillin sugar, salt and baking powder. Add 1 egg and 150 g butter in flakes and mix with the dough hooks of the hand mixer.
Then knead with your hands to a smooth dough. Roll out dough between 2 layers of foil to a circle (32 cm Ø). Carefully put the dough into a greased, flour-spread springform pan (26 cm Ø; 8 cm high), pressing the dough against the edge of the springform pan.
Prick the dough several times with a fork. Put the base in a cool place for about 30 minutes. In the meantime wash, clean and drain the blueberries. Cream 50 g butter, 1 packet of vanilla sugar and 150 g sugar with the whisk of the hand mixer.
Stir in 3 eggs one after the other. Stir in quark, cream, lemon juice and pudding powder. Fold blueberries, except for 2 tablespoons, into the quark mixture. Pour the quark mixture onto the base and spread the remaining blueberries on the surface.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: not suitable/ gas: level 3) for approx. 50 minutes. Take the cake out of the oven, remove it carefully from the edge of the springform pan with a knife and let it cool down in the pan.
Serve dusted with icing sugar.